A067343 Sum of decimal digits of n equals sum of decimal digits of sum of divisors of n.

1, 15, 24, 64, 69, 78, 90, 114, 133, 147, 153, 186, 198, 258, 270, 276, 288, 306, 339, 360, 366, 393, 429, 474, 492, 495, 507, 522, 582, 588, 609, 618, 627, 639, 708, 717, 738, 762, 763, 801, 817, 834, 846, 871, 906, 933, 960, 978, 990, 1062, 1080, 1083

Offset

1,2

Links

Table of n, a(n) for n=1..52.

Formula

A067342(n) = A007953(A000203(n)) = A007953(n).

Prog

(PARI) sd(n) = digs = digits(n); sum(i=1, #digs, digs[i]);
isok(n) = sd(n) == sd(sigma(n)); \\ Michel Marcus, Dec 26 2013

Crossrefs

Cf. A067342, A007953, A000203.

Sequence in context: A295160 A240597 A162964 * A247315 A154150 A324484

Adjacent sequences: A067340 A067341 A067342 * A067344 A067345 A067346

Keyword

base,nonn

Author

Labos Elemer, Jan 16 2002

Status

approved